CSVXLSX
Free online converter. No signup, no watermark. Just drop your file.
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.csv files · Up to 10 files, 100MB each
How it works
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About CSV and XLSX
What is CSV?
CSV (Comma-Separated Values) is a simple tabular data format that can be opened in any spreadsheet application or parsed programmatically.
What is XLSX?
XLSX is the modern Microsoft Excel spreadsheet format supporting formulas, charts, and multiple worksheets.
FAQ
Is this free?
Yes, completely free. No signup, no watermarks, no hidden fees.
Is my file safe?
Files are converted on our servers and immediately deleted. We never store or share your files.
What's the maximum file size?
You can convert files up to 100MB.
Will my CSV data be formatted in Excel?
The data is imported into a clean Excel spreadsheet. You can then add formatting, formulas, and charts as needed.
Are different delimiters supported?
The converter handles standard comma-separated CSV files. Semicolon or tab delimiters may need preprocessing.